Overview
The L4931ABD50 is a very low drop voltage regulator produced by STMicroelectronics. It is available in SO-8, DPAK, and TO-92 packages and offers a range of output voltages, including 5V for the L4931ABD50 model. This regulator is characterized by its very low dropout voltage of 0.4V and very low quiescent current, making it highly suitable for low noise, low power applications, particularly in battery-powered systems. The device also features a TTL compatible shutdown logic control, which allows for part of the board to be put in standby mode, reducing total power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nom) | 5 | V |
| Output Tolerance (typ) | ±1% | |
| Output Current (nom) | 250 mA | |
| Dropout Voltage | 0.4 V | |
| Quiescent Current (ON mode) | 600 µA | |
| Quiescent Current (OFF mode) | 50 µA | |
| Operating Temperature Range | -40 to 125 °C | |
| Supply Voltage Rejection (typ) | 70 dB at 1 kHz | |
| Package | SO-8 | |
| RoHS Compliance Grade | Ecopack2 |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current (Typ. 50 µA in OFF mode, 600 µA in ON mode)
- Output current up to 250 mA
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
- High supply voltage rejection (70 dB typ. for 5 V version)
Applications
The L4931ABD50 is particularly suitable for low noise, low power applications and especially in battery-powered systems. It is ideal for use in various industrial, automotive, and consumer electronics where low dropout voltage and low quiescent current are critical. Other applications include local voltage regulation in larger systems, power management in IoT devices, and any scenario where minimizing power consumption is essential.
Q & A
- What is the typical dropout voltage of the L4931ABD50?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931ABD50?
The maximum output current is up to 250 mA.
- What are the available output voltages for the L4931 series?
The available output voltages include 3.3 V, 3.5 V, and 5 V.
- What is the quiescent current in ON and OFF modes?
The quiescent current is typically 600 µA in ON mode and 50 µA in OFF mode.
- What is the operating temperature range of the L4931ABD50?
The operating temperature range is from -40 to 125 °C.
- Does the L4931ABD50 have built-in current and thermal limits?
- How much capacitance is required for stability?
- What is the supply voltage rejection of the L4931ABD50?
- In what packages is the L4931ABD50 available?
- Is the L4931ABD50 RoHS compliant?
